Wilder
This Is America's story
Gramedia, 1956
 Buku Teks SO
Crockatt, Richard
America embatted
Routledge, 2003
 Buku Teks
Eells, Elsie Spicer
South America's story / Elsie Spicer Eells
Robert M. McBride & Company, 1931
 Buku Teks SO
Dulles, Foster Rhea
China and America the story of their relations since 1784 / Foster Rhea Dulles
Princeton U.P., 1946
 Buku Teks SO
Audubon, John James
The birds of America
Macmillan, 1985
 Buku Referensi